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3 how defective items are indicated, 4 fault finding flowcharts – Nortel Networks DCT1900 User Manual

Page 384

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Technical Product Manual - DCT1900

Maintenance, Fault Finding Procedures

6-2

Maint-DCT1900/R8/mw

© 2000-2005

6.3

How Defective Items are Indicated

When the flowcharts lead to a possible cause, this is indicated by a statement giving the name of
the defective part or the cause of the problem, e.g. a defective SPU board is indicated by the
statement “SPU.” When there are more possible items, they are listed in order of decreasing
probability.

6.4

Fault Finding Flowcharts

START

General Alarm

active?

Common user

complaint?

Individual user

complaint?

Yes

GENERAL ALARM

No

COMMON USER

COMPLAINT

INDIVIDUAL USER

COMPLAINT

No

Yes

Yes

CSM PROBLEM

No